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  2. Row echelon form - Wikipedia

    en.wikipedia.org/wiki/Row_echelon_form

    A matrix is in reduced row echelon form if it is in row echelon form, with the additional property that the first nonzero entry of each row is equal to and is the only nonzero entry of its column. The reduced row echelon form of a matrix is unique and does not depend on the sequence of elementary row operations used to obtain it.

  3. AC power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/AC_power_plugs_and_sockets

    The plug and socket are rated 16 A 250 V AC and are intended for use only on systems having nominal voltages between 200 V and 250 V AC The plug pins are 4.5 mm in diameter, line and neutral are on centres 19 mm apart. The earth pin is offset 3.0 mm. The line pin is on the right when looking at a socket with the earth pin offset up.

  4. Alternating current - Wikipedia

    en.wikipedia.org/wiki/Alternating_current

    The abbreviations AC and DC are often used to mean simply alternating and direct, respectively, as when they modify current or voltage. [ 1 ] [ 2 ] The usual waveform of alternating current in most electric power circuits is a sine wave , whose positive half-period corresponds with positive direction of the current and vice versa (the full ...

  5. Electroforming - Wikipedia

    en.wikipedia.org/wiki/Electroforming

    The main advantage of electroforming is that it accurately replicates the external shape of the mandrel. Generally, machining a cavity accurately is more challenging than machining a convex shape; however, the opposite holds true for electroforming because the mandrel's exterior can be accurately machined and then used to electroform a precision cavity.

  6. Lockheed AC-130 - Wikipedia

    en.wikipedia.org/wiki/Lockheed_AC-130

    The Lockheed AC-130 gunship is a heavily armed, long-endurance, ground-attack variant of the C-130 Hercules transport, fixed-wing aircraft.It carries a wide array of ground-attack weapons that are integrated with sophisticated sensors, navigation, and fire-control systems.

  7. TreasuryDirect - Wikipedia

    en.wikipedia.org/wiki/TreasuryDirect

    A TreasuryDirect account holder can direct the Treasury to deposit all or part of their income tax refund into their account using IRS Form 8888. [6] A person can also instruct their employer to direct deposit an amount from each paycheck into their TreasuryDirect account, which replaced an earlier system where an employee could instruct their ...

  8. Certificate of deposit - Wikipedia

    en.wikipedia.org/wiki/Certificate_of_deposit

    A certificate of deposit (CD) is a time deposit sold by banks, thrift institutions, and credit unions in the United States. CDs typically differ from savings accounts because the CD has a specific, fixed term before money can be withdrawn without penalty and generally higher interest rates.

  9. 2024–25 AC Milan season - Wikipedia

    en.wikipedia.org/wiki/2024–25_AC_Milan_season

    The 2024–25 season is the 126th season in the existence of AC Milan, and the club's 91st season in the top flight of Italian football. In addition to the domestic league , Milan is also participating in the Coppa Italia , Supercoppa Italiana and UEFA Champions League .